Look Up Table (LUT) for gray level images

KNIME Extensions
1

Is there currently an option in the image viewer to use a colorful LUT for gray level images ?
This could be useful for heatmap visualisation…

I tried the Table Color based image renderer option but it returns
WARN Real2TableColorRenderer Unsupported color table format. Using linear grey ramp.

Thanks

2

This renderer is meant for images that already contain a LUT when read in. As far as I know there no ways to directly create ColorTables using KNIME Image Processing nodes. You might be able to using the Java Snippet node and some Imglib2 code, I could look into that if you are interested in such an option.
best,
Gabriel

3

Hi Gabriel,
Thanks fro the answer,
If you have a simple hack with python nodes eventually, otherwise dont worry with that, It would be a nice to have in the future :wink:

4

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